Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marissa S Sydial, PA-C
Physician Assistant in Merrick, NY · enumerated 2018.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336638063
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Registry record
Entity type Individual (Type 1)
Name Marissa S Sydial
Credential PA-C
Sex Female
Practice address 389 Merrick Ave, Merrick, NY, 11566
Phone (516) 867-5132
Enumeration date May 8, 2018
Last updated in NPPES Mar 12, 2024
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 022028 (NY) Primary
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Marissa Sydial practice?
The practice location on file with NPPES is in Merrick, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marissa Sydial?
The National Provider Identifier (NPI) for Marissa Sydial is 1336638063, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Shane Tatar Medical Physician Assistant · Merrick, NY NPI 1770932303 Cristina Murphy Mental Health Counselor · Merrick, NY NPI 1942742630 Nicole Gardocki Adult Medicine Physician · Merrick, NY NPI 1720551229 Darlene Sanchez Family Nurse Practitioner · Merrick, NY NPI 1588210561 Hinal Patel Orthopedic Physical Therapist · North Merrick, NY NPI 1306485289 Mary Cataldo Mental Health Counselor · Merrick, NY NPI 1760370464 Lauren Kildare Mental Health Counselor · Merrick, NY NPI 1376423012 Shannon Budgell Mental Health Counselor · Merrick, NY NPI 1326909862
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-03-12.